// Copyright 2021 Chaos Mesh Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

package expr

import (
	"github.com/antonmedv/expr"
	"github.com/pkg/errors"
)

func EvalBool(expression string, env map[string]interface{}) (bool, error) {
	eval, err := expr.Eval(expression, env)
	if err != nil {
		return false, err
	}
	result, ok := eval.(bool)
	if !ok {
		return false, errors.New("expression result is not boolean")
	}
	return result, nil
}
